Add submission # 6647

#6647

Author: ArduinoBot

registry.txt

@@ -8258,3 +8258,4 @@ https://github.com/njazz/rowguelike.git|Contributed|rowguelike
 https://github.com/akarimiz1/E62Module.git|Contributed|E62Module
 https://github.com/ErtugrulKra/ESP-Music.git|Contributed|ESP-Music
 https://github.com/nexbyteio/ZenLib.git|Contributed|ZenLib
+https://github.com/tomorrow56/ESP32_LINE_Messaging_API.git|Contributed|ESP32_LINE_Messaging_API